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Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Of Inventories [Abstract]

Summary of inventories

		2018		2017
	US$m			US$m
Raw materials and purchased components		734			648
Consumable stores		862			875
Work in progress		1,026			1,082
Finished goods and goods for resale		977			1,027
Total inventories		3,599			3,632
Comprising:
Expected to be used within one year		3,447			3,472
Expected to be used after more than one year		152			160
Total inventories		3,599			3,632